二、三、四、五阶常系数线性微分方程解法公式与计算机求解

Deriving of Formula & Solving by Computer about 2 , 3 , 4 , 5 Order Linear Differential Equation with Constant Coefficient

推导出二、三、四、五阶常系数线性微分方程的解（即函数关系）的一般表达式，并分别用Ｂａｓｉｃ语言和Ｐａｓｃａｌ语言编制出使用计算机求解的应用软件。该软件实际运行的结果证明，这种求解方法比任何一本《高等数学》教材介绍的通常的求解方法要简单得多、运算速度要快得多，因而具有很大的现实意义。

In this paper ,solving formula (i. e. founctional relation)about 2, 3, 4, 5 order linear differential equation with constant coefficient is derived and programmed in Basic and Pascal respectively. The running result shows that solution is simpler and arithmetic speed is faster than normal solution introduced by any text books of'higher mathematics', so the practical significance is great.